Yarn guiding block for weaving shuttles



Aug. 19, 1952 5, 600 2,607,371

YARN GUIDING BLOCK FOR WEAVING SHUTTLES Filed April 26, 1950 /1151 1 Emv vrokf A%%/3 $3.01 Wooa 60 4? j 1 v" Z 34% IE9 Z ATTORNE v PatentedAug. 19, 1952 UNITED sTA-T scorer-1 1,") .1'

This invention relates to a weaving shuttle of the self-threading typeand more particularly to a' yarn guide block disposed inthe shuttlebetween the chamber which receives the bobbin and the tip of theshuttle, which giude block serves to thread and guide the yarn into thedelivery eye of the shuttle.

In order to attain perfect weaving, it is necessary to provide areliable and effective thread guiding means particularly when weavingwiry and hard-twisted yarns, since such yarns exhibit a tendency to kinkadjacent to the delivery eye of the shuttle and in so kinking to twistand writhe in such a Way as to escap from the shuttle eye with resultantmispicks or breakage of the filling. Likewise it is necessary to providesome effective means for automatically threading the delivery eye whichwill be effective upon the transfer of the filling into the shuttle.

It is also necessary to provide some means of securing a uniform yarntension as the=yarn is drawn through the delivery eye. Such yarn tensionhas heretofore been provided by tension-pads which are resiliently urgedtoward each other to engagethe yarnfrom either side; If these pads arereplaced in the block, they are positioned through a hole in the bottomof the block as the forward guide pin for the yarn is removed with greatdifficulty.

One of the objects of this invention is to provide a construction whichmay be more easily and inexpensively manufactured than the structureshown in my prior Patent 2,470,064 dated May 10, 1949. I

Another object of thisinvention is to provide a stationary yarn guide byreason of theshap- ,ingof the overhang of the block'which willeffectively hold down the filling should there be a n Figure 6 tendencyfor the filling to lift up as the yarn is V drawn from the bobbinthrough the delivery eye. *Another object of this invention is toprovide a structure which may be formed for either rightor left-handbobbins from the same parts and by a different assembly of the parts.

Another object of this invention is to provide an arrangement for easierreplacement of the friction pads in the block than has heretofore beenprovided.

With these and other objects in view, the invention consists of certainnovel features of construction, as will be more fully described andparticularly pointed out in the appended claim.

In the accompanying drawings:

Figure 1 is a fragmental top shuttle embodying the yarn guiding blockplan view of a which '=,Figure S is aside block with the shuttleomitted;

q H central sectional view on'line T ill-offsFig ure 2 through afragmental portion of the shuttle and the threading block";

Figure dis a section of'the threading block with the tunnel guideomitted and showing'one of the friction pads as being inserted theshuttl ey "v is a perspective view of the-threading block and the bobbinin their relative relation; Figure '7 is a perspective view of thetunnel guide member; 7 Figure 8' is a section on line 8-8 ofFigiire 3 ofa modified form with the tunnel guide positioned on the opposite side ofthe block;

Figure 9 is a sectional view through the tension pads; p

Figure 10 is a section on line lll-l0 of Figure 3; and 1 4 Figure l1-isa section onlihe-H-ll of FigureBL In proceeding with this invention Ihave' simplified the manufacturing of the structure shown in myabove-mentioned patent. The cast block i tead of having the thread guideas formed integral asone piece with'the block, it is formed with "acentral-opening at the chamber end of the block with recesses in bothside walls of this opening into which a separate member maybe inserted,which member forms the thread guid ing portion or tunnel through whichthe thread extends, and by having these recesses on "both sides of thewalls of the opening, the =member maybe inserted in one or the otherrecess, depending upon whether it is desired that the threading blockaccommodate a right-hand wound or left-hand wound bobbin. Further, bymaking one of the'yarn guiding pins forward of the tension padsremovable, I may remove.

and insert the threading pads throughtheslot atthe upper edge of theblock and swing them into position rather than removing old pads andinserting new pads through the bottom wall of the block. Further,'I havegrooved the under side of an overhanging portion of the shuttle blocktohold the thread against a tendency to unthread. v

With reference to the drawings, ll] designates generally a weavingshuttle of the type commonly used in automatic looms and provided at itsend with the usual metal tip II. The body drica1 guiding tunnel 34 andbe the block.

12 of this shuttle has an elongated chamber I3 for the reception of abobbin l4 having yarn l5 packaged thereon. At the forward end thechamber l3 communicates with a recess H5 or pocket for the reception ofa yarn guiding block designated generally I! and shown in perspective inFigure 6..

This guiding block I! is usually of cast metal providing aahorn l8 and aguard l9 at one end. Below the'horn there are two hardened posts aboutwhich the yarn leads as it extends through the delivery eye 22 of theshuttle. The body of the block I1 is more closed in and solid than isusually found to provide thicker walls and there extends lengthwisethrough this closed-in solid portion a lengthwise extending openingdesignated 23 and spaced from the top, bottom, and opposite sides. Theside walls of this opening 23 are provided with recesses 24 in the wall25 on one side and 26 in the wall 2''! on the other side, which recessesextend through the Walls to the outer surface. A member 28 of J-shapedcross section (see Figure '7) having a shank 29 and a hook-shapedportion 30 may have its shank 29 inserted in either of these recesses 24or 26, depending upon whether the bobbin package I5 is wound right-handor left-hand. The hook portion 33 will be supported in a dependentrelation; when the shankis inserted in the recess as described, leavingits edge 3| spaced from the wall which supports it and also leaving aspace 3| between its convex surface and the opposite wall .so that athread may enter throughthe slot 33 at the top which extendslongitudinally of the block and pass around the convex surface 32 andpast the edge 3| into the generally cylinguided through This slot 33extends longitudinally throughout ,the length of the block and iswidened out somewhat although less than usual into a chamber 35 in whichthe friction pads designated generally 36 are located. The slot alsocommunicates with ,a laterally extending opening through the block 31through which the thread will pass to be guided about the post 20.

The opposite walls 40 and 4| of thelchamber 35 are provided withrecesses 42 and'43' for the 'reception of the ofiset portions 44 of thefriction pads 36.- Thes pads are usually replaced through an opening inthe bottom wall -l5 'of the block as ..the yarn guide pins 45 and 4?usually prevent removal, making necessary verticalflpa ssing ofvthe'pads between the pair of pins. Here, how- :ever, the pindesignated41 and shown in Figure 10 is removable, and the slot 35 is of adimension .to permit thepads to be passed therethrough and each pad hasits offset portion 44 insertedinthe opening either 42 or 43, as shown inFigure 5,

and then swung down through the slot or space 35 into position .byswinging movement and there after the pin 4! 'is {passed through asuitable opening in the wall 40 and threaded intoa threaded recess 41'in the wall 4.! so as to prevent the pa'dsfrom swinging forwardly; thus,the pads are retained :between the yarn guide pins 46 and 41. in avertical position depending from the openings 42 and 43. These pads aretensioned in a 54 passes.

gagement as at 50 with the walls so that by utilizing an hexagonalsocket 5!. these cups may be screwed into position to adjust th tensionof the pads. A pin 52 passes through the pads to also anchor them inposition.

In-order to lock the threading'b-lock 11 into the shuttle l2, there isan opening 53 extending laterally through the block, through which a pinThis pin has a head 55 setting into a recess 56 in one side of theshuttle and is threaded as at 51 to engage a nut 58 in a recess 59 inthe other side of the shuttle. The pin is at a location above the edge3| of the J-shaped member so that the thread cannot drop over the edgewhen once threaded into the tunnel; thus, this pin 54 in addition toholding the block in the shuttle also serves as a means to preventunthreading.

The horn [8 which usually-has a smooth undersurface is notched as at 53sothat shouldthe thread tend to-slide along this smooth undersurface itwill be caught inthe notch 60 on theunder surface of the horn l8 andassist in preventing unthreading should an unwieldy threadget into thisposition. t 1 Iolaim: 30 I theend of the bobbin chamber and the tip ofthe shuttle, said block having a longitudinal yarn A shuttle guide blockto be disposed between entrance slot extending throughout the length ofthe block from its top surface downwardly, and having an openingextending into the block from the chamber end thereof and communicatingwith said slot, both of the side walls along said opening being recessedand a member generally J-shaped in cross section having its endselectively positioned in one recess and supported thereby fortheaccommodation of either rightor leit hand wound bobbins with its hookportion downwardly suspended in said opening to provide "a longitudinalthread guide through and within -the hook portion with-a threa n pas- 1sage thereto from the slot through the opening and about the edg of thehook portion.

SETH WOOD. REFERENCES CITED-.1. L

l "The following references are of recor'd in the .fil'eiof. thispatent;

UNITED" STATES PATErrrs;

' 6 Date -Number I Nanie 1,631,090 D'avis' May 31, 1927 1,684,780 Ricard-Q Sept. 18,-1928 2,002,131 Spencer May 21, 1935 --2,087,60'7' Park July20, 1937 I 2,281,972 i Golf :May 5, 1942 2350,30? Allen May 30, 19442,407,162 Kaufmann Sept; ,3, 1946 2,573,666 Kaufmann Oct. 30, 1951 IFOREIGN PATENTS Number 7 Country Date France Oct. 23, 1923

